Method and mechanism for grinding rods



R. H. COWDERY.

METHOD AND MECHANISM FOR GRINDING RODS June 28, 1932.

Patented June 28, 1932 methods and mechanisms for UNITED I STATES ROBERT H. COWDEBY, OF GENEVA., OHIO, ASSIGNOB TO AMERICAN FORI & HOB

Pmialaii ori-fica COMPANY, OF CLEVELAND, OHIO, A CORPORATION F ,OHIO

METHOD AN D MECHANISM FOB GRINDING RODS Application filed June 28,

yMy invention relates to improvements in tapered rods, and relates particu arly to lil methods and mechanisms adaptable to form tapered rods by grinding processes.

Anobject of my invention is to provide for grinding rods to atapered form 'in such a way that the rod may be varied in outside diameter in a predetermined manner.

Another object of my invention is 'to provide for the grinding of tapered rods, the degree of taper of which is not uniform throughout the length of the rod.

Another object of my invention is to pro; vide or grinding the rods to a tapered form in a highl ecient and economical manner.

Other o jects of my invention and the invention itself will become apparent from the following description of a method and mechanism embodying m invention, and in which reference will be had to the accompanying drawing illustrating the said embodiment, `and forminga'part' of this specification.

lln the drawing:

Fig. 1 illustratesa plan view of a mechanism adapted to `carry out a process of my invention.

Fig. 2 is a side elevational view oi the mechanism illustrated in Fig. 1.

Fig. 3 is a view taken on the line 3-3 of Fig. 2, of certain parts of the mechanism including the grinding wheel, work rest, and gage block. f

l1 ig. d is a sectional View of the gear driving mechanism taken on the line 4 4 of ig. is a view of a steel shing rod distort/ed by multiplying .only the transverse dimensions by afactor to show relatively the variations in outside diameter of a rod made `type specifically. known as a casting rod and which is provided with a body portion 1,

grinding 1928. Serial No. 287,789.

adapted to be inserted into a handle socket, a portion 2' adjacent the body and of relatively enlarged. diameter, and other portions 3, 4, and 5 disposed progressively nearer the tip end 7. Such a rod may be of, say, 3% feet to 5% feet in length and of ,diameters varying, sa from .350 inches in the portion 2 tapere to a minimum 'diameter of .147 inches in the portion 3, then tapering slightly to a larger diameter such as .156 in the portion 4, whence toward the. tip the rod is greatly tapered in portions 5 and 6, and in the tip portion 7 the degree of taper is preferably at a relatively more rapid rate than in .the portions 5 and 6, the tip portion being preferably inch in diameter.

A rod so formed has very desirable rop-.A erties in use but heretofore has been di cult reference characters, and in ali of which the rod is generally designated by the character R, at 8 I show a longitudinally extending machine'bed provided with sup Orts 9 and comprising longitudinally exten 'ng guides 10 and 11 slotted at 12 and 13 for a purpose later described.

At one end of the bed an electric motor 1d is provided which is adapted to drive a spin-= dle 15 provided at its end with a 'chuck 16. The chuck 16 is adapted to receive the butt end 1 of a rod l?. which it is desired to grind to the form illustrated in Fig. 5. f

'The rod is'irst reduced by grinding, turn ing or the like at the end 1, to its iinished plug form for introduction into the socket of a fishing rod handle and is chucked by this reduced portion. Otherwise the rod to be operated upon will be oapprommately uniform diameter throughout its length..

At 17 1 show a carriage for 'e second elecreduce a tric motor '18, carr v"ng on one endo its rotatable shaft, a grinding wheel 19, and supis, secureddirectly to the motor.

Likewise the abutment member 20 is provided with a base 27 which is dove-tailed into a similar transversely extending groove 28 in the base and the abutment member, with the rest 22 secured to it, is guided to 'such a laterally adjusted position as is determined by the guiding projection 23 in the ide slot 12.- The rest, abutment member, an motor are all supported on the same base 17 the base being mounted on the machine bed. Projections 23 and 24, from the vmotor and abutment member respectively, extend intothe guide slots 12 and 13.

The frame is, therefore, movable longitudinally of the bed'and the slots 12 and 13 through the motor and abutment projections received in the slots at all times determines the lateral adjustment of the motor and the abutment member respectively. The slots 12 and 13 do not extend parallel each to the other but follow the longitudinal configuration of opposite sides of the rod R, as illustrated in Fig. 5, which it is desired to obtain by the grinding process.

' Consequently the projections 23 and 24 are adapted to. be guided laterally relative to each other.

Through a suitable set of gears 14', a. threaded shaft 29 is continuously rotated in axially aligned bearings 30 and 31 being driven at a rate of speed reduced relative to that of the spindle 15. A depending exten` sion 32 of the carriage 17 is longitudinally bored and the shaft 29 being telescoped within the bore with its threads in driving engagement with the rack shaped teeth 40 of a clutch key 41 projecting from above into the bore of the extension 32. Rotation of the' shaft 29- will effect amovement of the carriage 17 longitudinally of the bed and at a rate which is predetermined by the pitch of the threads on the shaft 29 and the rotational rate of the shaft as predetermined by the gear ratios and relativeffpositions of the gears of the lgear set 14.

The clutch key 41 is in the form of a cylindrical pin and is telescoped within a. bore of the carriage extension 32 disposed vertically above and at right angles to the -bore which receives the threaded shaft 29. A handle 42 is provided at the top end of the clutch key an a spring 43 is provided to continuously force the key' downward so that its end which contains arcuately formed transversely exto be operated upon toward the foot 33 of the bed, and the motor 17 being simultaneously operated with the motor 14, to respectively rotate the grinding wheel 19 and the rod R,

Y simultaneously, the rod may be ground down fromits initial uniform'diameter generally increasingly as the grinding operation progresses, being guided'by the slots 11 and 12, the grinding wheel 19, supported by the motor, andthe abutment member will approach and recede, correspondingly, so that when the grinding operation is completed the rod will have the form of that illustrated in Fig. 5.

It is obvious that other forms of rod of circular cross-sectional form may be made by the grinding machine substantially as illustrated and above described, by simultaneously and oppositely varying the inclination of the guiding slots relative tothe longitudinal medial line of the machine bed so that if desired, ferrules, swirls, necks or the like could be formed in different portions of the length of the rod.

At the foot end of themachine, I provide a steady rest for the rod comprising a block 35 bored at 36 in axial alignment with the rod and preferably having flaring mouthopenings at either end containing a pressure shoe 37 recessed in the block aboveand medially of the bore 36 which is urged downwardly by a spring 38. The pressure'shoe is preferably provided with a rounded contact end adapted to engage the rod R. The bore 36 is suiiiciently large so as to provide a proper clearance for the rod R before the rod is operated upon, ,and the block 35 is slidably mounted on the bed of the machine so that when the grinding carriage 17 is in position for grinding the tip end 6 of the rod, the steady rest block 35 for the tip end can be moved toward the foot of the machine in order to permit grinding of the rod tip.

After` the shaft has been completely formed, the carriage 17 may be'retracted by manually lifting the handle 42 to disengage the rack teeth on the clutch key from the threads of the shaft 29 whereupon the carriage with the grinder, abutment and rest, will `beradially shiftable on the bed to the starting position for grinding another rod, which may be then secured in the vchuck` 16.

Having thus'described my invention, I amv ployed to grind tapered rods of cross-sectional shapes other than round, such as square, hexagonal, or the like. In such applications of my invention, the chuck 15-16 would be of any well known stationary or non-rotatingvise type and successive grinding operations would be made longitudinally on the non-rotating rod and on different circumferentially spaced portions of the rod.

I claim: 1. In a grinding mechanism Jfor grinding rods to a predetermined tapered 0rm,vthe combination with means for rotating the rod of a grinding wheel disposed at one side o the rod, enga eable therewith, of an abutment disposed at t e opposite side of the rod and adapted to prevent lateral displacement of the rod by the wheel, a support for the rod adjacent the wheel, means to accomplish relative movement between the rod and the wheel, abutment and support, whereby dierent portions of the length of the rod are successively exposed to the abrading infiuonce of the Wheel and means effective to simultanemove the wheel and abutment laterally ousl of tlire rod in opposite directions at equal rates of movement, and means effective to accomplish a predetermined lateral adjustment'of said wheel and abutment at all points in the length of the rod.

2. vIn a grinder for tapered rods and tubes, the combination of a bed Jfor the grinder, a rotary grinder wheel, means forV simultaneously rotating the work and Athe grinder Wheel, an abutment member, said grinding wheel and abutment. member being disposed on opposite sidesof the work, a common supv port for said abutment and grinder wheel, a

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rod support on the common support, means to effect relatively longitudinal movement of said common support and work, while the work and grinding wheel are rotating, and means simultaneously operable to ed'ect simultaneous equal oppositely directed laterai guiding movements of the-grinder wheel and abutment according to the relative longitudinally adjusted position oi the work..

3. In a grinding mechanism for grinding rods to a predetermined tapered form, means for supporting the rod to be ground, a grinding wheel having a working portion disposed at one side of the rod and engageable therewith, an abutment disposed at the oppositeA side of the rod and engageabie therewith to prevent lateral displacement of the rod by the wheel, means for setting up relative movement between the rod and the wheel and abutment longitudinally of the rod, whereby portions along the length, of the rod are successively exposed to the abradinginduence of the wheel, and means effective to simultaneously move the wheel and abutment lateraliy A of the rod in opposite directions at equal and predetermined rates of movement concurrently with 'the said longitudinal relative movement.

4. In a ygrinding machine for grinding tapered rods, tubes or the like, a bed for the grinder, a rotary grinding wheel, means for supporting the work piece to be ground, means for rotating the grinding wheel, an abutment member, the rindin wheel and abutment member beingisposed on opposite sides of the work, a commonsupport for thev abutment and grinding wheel, means for setting up relative movement between the suiport and the work longitudinally of the wor and means simultaneously operable to effect oppositely directed lateral movements of equal and predetermined amounts' of the grmder and abutment concurrently with the said relative longitudinal movement.

5. In a grinding mechanism for grinding rods to a predetermined tapered form, means .for supporting the rod to be ground, a grindlng wheel having a working portion disposed at one side ofthe rod and engageable therewith, an element of the machine disposed at the opposite side of the rod and engaging the rod to limit lateral displacement of the rod by the wheel, means for setting up relative lib',

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